.c-header {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-weight: 600;
  font-size: 34px;
  background: skyblue;
  .header-back {
    position: absolute;
    left: 20px;
    //top: 50%;
    //transform: translateY(-50%);
    //top: 0;
    height: 64px;
    width: 64px;
  }
}